Electrically-controlled power transmission



July 3l, 1923.-

M. TAIGMAN ELECTRICALLY CONTROL-LED POWER TRANSMISSION Original Filed June '7. 1921 3 Sheets-Sheet l WIT/VESSES Julysl, 1923. 1,463,449

M. TAIGMAN ELECTRICALLY CONTROLLED' POWER TRANSMISSION Original Filed June '7. 1921 l3 Sheets-Sheet 2.

:I 54 a9 1m A TTUR/VEY July 31, 1923.l

M. TAIGMAN v ELECTRICALLY GONTROLLEDPOWER TRANSMISSION 1921 3 Sheets-Sheet 3 Original Filed June '7.

Patented July 3l, i923..

T T S Taxen, or New Yoan, n. Y.

ELECTRICALLY-CONTBOLLED YOWER TRANSMISSION. l

Application led June 7, 1921, Serial No. 475,181. Renewed April al, 1S.

To all whom t may concern:

Be it known that I, MAX TAIGMAN, a citizen of the United States, and resident of New York cit in the county of New York and State of ew York, have invented certain new and useful Improvements in lllectrically-Controlled Power Transmissions, of which the following is a specification.

The invention relates t a motor driven transmission and control for machines which are subjected to rapidly re-occurrin'g intermissions in their operation and specifically relates to an attachment constituting a complete article of manufacture designed to be mounted on the frame of a motor driven sewing machine and designed to be disposed between the motor and the 'machine driven thereby.

In sewing machines of the factory type it is usual to actuate the machines at high speed, often attaining as much as three thousand stitches per minute. This high speed operation permits the operator to run along a seam'for a few seconds, at the end of which run, and with the needle in locked position engaging the goods, the material is quickly shifted, often in a fraction of a second, after which the line of stitches is run in another direction. During this shift in vdirection it is desirous that the machine be positively inactive and with the needle stationary in locking position` engaging the material, but it, is not economy to have any more parts lose their momentum than is absolutely necessary.

Further this rapidly repeated starting and stopping places a severe strain upon the motor parts, necessitating thgnse of a braking device, which of course wears away rapidly,l for (it has to resist the torque of the moving parts lwhich must be stopped in order to stop the needle. y

Accordingly, lone of the objects of the invention is to provide asimple form of motor actuated machine driving transmission in which frictional resistanceis minimized, in which the current is quickly and positively shut off from the motor when not necessary for an active drive and in which ,the driven machine may be braked without the necessity of braking the massive revolving motor parts which revolve at high speed even when thel current is shut off.

I attain this object in general by providv ing 'suitable anti-friction bearings and by 2 looking in the providing a .pulley clutch ty e of drive between the motor and the machine and a ccntrol therefor so organized that the motor and theV driving element of the clutch'are held bya brake and with the control so connected with a circuit closer controlling the motor that the single act of closing the circuit through the motor will simultaneously move the clutch elements'into driving enga ement and positively release the brakea till another object of the invention and further featuring simplicity of construction,low manufacturin cost and ready ac# cessibility to the severa parts, is to locate practically all of the motor control electrical features in a single ready removable and replaceable unit assembled in the bracket in such a wayas will minimize fire and shortcircuiting accidents. s

Among the other objects of the invention are to provide a simple form of braking means which can be readily adjusted to fit different diametered pulleys to be braked; which will promptly stop the action of the relatively light driven parts of the machine when disconnected from the .motor and incidental to these objects it is a further desideratum to provide a braking arrangement which will-have no tendency to slow down the momentum of the unclutched motor.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and inpart will be more fully set forth 1n the kfollowing particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features ofv construction and combination of parts hereinafter set forth and claimed.

. Referring to the accompanying draw- 1n s:-

igure 1 is a fragmentary view in front elevation of a motor driven sewing machine with a preferred embodiment of my invention attached thereto, shown largely in axial section and with the driving motor and pedal shown in ghost outline. s f

Figure .2 is a plan view of the attachment shown in Figure 1.

Figure 3 isa vertical sectionalview taken approxim'atelyon the line 3`3 of Figure direction indicated bythe arrows; v

Figure 4 is an enlarged detail view of the is substantially in line withthe axis of the shaft thus tending to ,minimize binding ac tion between the shiftedpulley and its shaft as the pulley is moved into 'its clutching relation with the coacting pulley. The second arm 43 extends upwardly from the arm 41 and constitutes a support and an actuating arm for a brake 'member 44 which overlaps the pulley 21 and is provided at its free end with a removable brake member 45v designed norinally to bear in the groove of the pulley 21 to break the action thereof against the dead pulley shaft 19 and therethrough to break the action of theA sewing machine 12.

It is intended that different diametered pulleys be substituted for the pulley 21 and one such different pulley is shown at 46 in Figure4. To accommodate for small differences in diameters of the pulleys and to compensate for the wear on the member 45 this member is ad'ustable by means of a binding screw 47. owever, with relatively great differences in diameters of the pulleys used, it is sometimes desired to ma e the brake member accommodate itself to greater ranges of adjustment than can be provided by the shifting of @the brake member 44. For this purpose the brake member 44 is formed substantially T-shaped, with a broad head 48 for carrying the member 45. Opposite ends 49 and 50 of this pulley engaging member 45 are each'to be adopted to provide the braking surface for engaging the pulley, and are preferably madel of or outlined by a leather surface. The stem portion 51 of the lshape memberf44 is. offset from the portion 52 engaging'the head and this offset portion is provided with a hub 53 designed to engage apivoting pin 53 which projects fromthe arm 43 in a direction parallel to the axis of rotation of the member 39. A set screw 54'which may be reversed in position is threaded through the oifset portion 44 and bears on a face 55 constituting part of the arm 43 so as to`vary the position ofthe surface 49 or 5() relative to the ulley periphery designed to be engaged by t e surface. It is appreciated that the set screw may be withdrawn and reversed in position, the member 44 reversed so as to cause the portion 52 to become further spaced from the pulleyl and thus cause the surface 50 to engage a larger sized pulley, as shown more particularly in Figure 4.

Another arm 56 projects rearwardly from the end of the hub 40 adjacent the extension 35- and constitutes an actuating lever for .rocking the lmember 39 about the supporting shaft 38.v The end of the lever 56 is connected to the pedal 13 by means of'a link rod 57. Another arm 58 which constitutes, .'n effect, an extension of the arm 56 extends above and parallel to the extension 35, overlaps the bracket as shown in Figures 1 and 2 and is provided at its forward vend with a head 59 designed to control a circuit closer hereinafter more fully described. A coiled spring 60has long ends 61 and 62 which extend lengthwise of the extension, with one of the ends 61 secured to the top ofthe bracket by means of a screw'63 and its other end 62 bent and hooked 'into a notch 64 formed in the upper side 'of the lever 58 in spaced relation tol the fulcrum -of the member 39. It is appreciated that by means of this construction it is possible to utilize a relatively ,weak spring to actuate the circuit closer, to move the clutch shifter into an inoperative osition and to exert a powerful Yleverage e ect upon ,the brake.

The portion ofthe bracket in advance of the extension is provided atv top and bottom with forwardly projecting lugs, one of which -65 is shown in Figure 2, and yagainst this portion of -the bracket is fitted la' moulded plate 66 designed to carry'the circuit closer and its associated electric current carrying parts. The circuit through the motor 14 is controlled by a normally opened switch-67 which includes a movable contact member 68 in the form of a lever held normally in circuit breaking positioncby the bearing engagement on one short arm 69 thereof, of a plunger 70 held in depressed position by the action of the spring 60 bearing on the arm 58 as more clearly shown in Figure 1. The

ymovable element 6 8 lis moved into circuit closing engagement, as shown in Figure 6, with a relatively fixed contact 71 `by vits weight which action is assisted by a spring 71 engaging underA the extension-69. It is a feature of `this disclosure thatl the fixed parts of the circuit closer be formed in the plate 66 coeval with its formation and in the showing in Figures 6 and'7-it is to be understoodwthatthe relatively lixed contact member 71 is secured to a plate 72 inset into the front face of the plate-66, and, if necessary, secured vin place byv means of through bolts 74. Similarly the front face 73 is ro'- vided with circuit terminals 75 and 76 w ich are designed to be engaged by' a removable plu 77 of conventional form carrying the lea s cuit. In the showing disclosed the terminal 75 constitutes a support for one end of the spring 71 and an upwardly extending screw 77 from this terminal coacts with a stud 78 depending from the arm 69 to guide the spring.

While the spring 71 may constitutel a conductor for the `electric current leading to the 78 constituting part ofthe motor cir-- movable element ofI the circuit closer, prefthe current is conducted through anis provided on its upper side with a guiding.

sleeve 86 for guiding the upwardly projectin plunger 70.

he supporting bracket may also be provided on the side opposite the circuit closer with a manually actuated switch 87 for controlling the motor circuit` In operation and assuming that the clutch elements`shown in Figure 1 are inthe position illustrated and that the circuit closer shown in Figure 6 is in'an inoperative position with the power circuit to the motor broken at the contacts and with the brake member holding the machine inactive, the operator bears down upon the pedalj13. The initial part of this action will raise the leve-1258 a distance sufiicient to permit the spring 71 to bring the movable contact member 68 into circuit closing engagement with the stationary contact 70 thus closing circuit through the motor 14 and causing the motor to pick up speed. YAt the same time the intense braking action of the member 44 against the pulley 21 begins to be reduced and as the operator continues to press down on the pedal 13 thebrake isfinally moved clear ofthe pulley at which time the arm 41 has swung its bearing screw 42 into engagement with the bearing 28 and has acted therethrough to move the clutch members into inter-clutching engagement. Power is thus transmitted through the belted connections 25 .and 22 from the motor directly through the clutch` to the driving pulley on the machine. During this time the movable contact member '68 is maintained in lirm bearing engagementagainst the contact 70 by the spring 71 which thus prevents any jarrlng of the machine from braking the circuit.

The sewing machine is operated as is usual with such devices and when the operator desires to stop the machine suddenly he releases pressure on the pedal 13, which permits the relatively powerful sprin to snap the brake member into firm bra ng engagement with the pulley 21 thus stopping the machine almost instantaneously. This4 action will also automatically break the cir-` cuit through the motor but the motor andthe pulley 23 connected thereto are free to spin around vpractically at the high speed at which these devices are usually actuated.

Eventually the motor will die down to a stop but in the normal operation of the machine there will be no perceptible diminution of speed of the motor parts during the second or fraction thereof during which the operator is shifting the goods. When the 21 against the dead 'shaft 19, which braking action will have no e'ect, whatsoever, upon the freedom of rotary movement of the motor actuated pulley 23. The whole organization of the parts is primarily directed'to a construction which will permit the positive braking of the sewing machine with the least possible brakin action on the mo,.-

` tor and its drivenpa-rts t ereby effecting an economy in consumption of electric energy. Having thus described my invention, l

claimz- 1. An article of manufacture complete in itself and constituting'the controlling con- -nection between a downwardly extendin `motor driven belt and an upwardly exten ingl machine 'driving belt, said article comprising a supporting bracket adapted to\be4 secured to the frame of the machine'to bell driven, a combined two-pulley clutch with one of the pulleys adapted to receive the driven belt and the other pulley adapted to receive the driving belt and a brake for braking themovement of the pulley carrying the driven belt, said brake and clutch carried by the bracket and a single control also carried by the bracket and adapted to be connected to a pedal for actuating `the clutch, brake and circuit closer in proper operative sequence, said article being removable from the machine as a unit after the belts'are slipped of their pulleys.

2. An article of manufacture constituting the driving connection between a motor driven belt and a machine driving belt, said articleincluding a supporting bracket provided with means for securing the same to a support, a circuit closer carried by the bracket, a clutch adapted when in operative position `to transmit power from the drivingto the driven belt and a manually yactuated control carried by the bracket for simultaneously controlling the circuit closer and clutch.

3. An article of manufacture `constituting the driven connection between a motor driven belt and a-machine driving belt, said article comprising a bracket provided with attachments ,for demountably securin the same in place between the motor an the machine to be driven thereby, said bracket provided with means for transmitting power at will from the driven to the' driving belt,

lll@

f erating all of said -means in proper relatlon ing the t0 interrupt the operation of the motor and to brake the'driven machine. 4f. An article of manufacture constitutdriving connection between a motor ydriven belt and a machine driving belt, said yarticle comprising a bracket provided with attachments for demountably securin the same in place between the motor and the machine to be driven thereby, said bracket provided withmeans for transmittingpower at will from the driven to the driving belt, with lmeans for braking thev machine and with means for controlling the motor, a single manually actuated mechanism for operating all of said means in roper relation to interrupt the operations ofp the motor and to brake the driven machine and a switch carried by the bracket for controlling the electric circuit which includes the 'circuit closer.

5A. In a device of the class described,the combination of a bracket provided with means for mounting the same in piace, an extension projecting laterally from V ne side of the bracket, a control shaft card by the extension, a circuit closer casing carrie by the bracket 0n the side thereof opposite the extension, a circuit closerincluding a vertically movable plunger slidably mounted in the casing and projecting from the same, and a lever fulcrumed intermediate its ends on said shaft, with one arm extending across the bracket and bearing on said' plunger to move the sameand the other arm constituting an actuating lever.

6. In a device of the class described, the combination of a bracket provided with means for mounting the same in positionand provided with a spring laterally extending carried by the bracket on the f side `thereof opposite .the extension, a lever pivoted to the extension with one arm pfojecting rearwardly from the extension* and constituting an actuating lever and another arm paralleling the extension and operately connected to the circuit closer to control the same, and a coiled springhaving end portions extending parallel to the extension with one end secured to thextension 'and the other end engaging the circuit Jcloser controlling arm in spaced relation to the fulcrum of the lever whereby a relatively weak spring can exert a powerful leverage i combmatlon of a support, a'lubricant. re-

means for mounting the same in 'position a laterally extending' and provided with spring supporting extension' projecting supporting extension projecting` rearwardly from the bracketa circuit closerI rearwardly from the bracket, a circuit closer carried by the bracket on the Side thereof opposite the extension, la lever pivoted to th`e extension with one arm projecting rearwardly from the extension and constituting an actuating lever and another arm constituting a combined bracket and clutch con.

trol Iparalleling the extension and operately connected to the circ-uit closer to control the same and a coiled spring having end portions extending parallel to the extension with one end securedto the extension and the other end engaging the circuit closer controlling arm in spaced relation to the fulcrum of the lever whereby a relatively weak spring can exert a powerful leverage on the circuit closer controlling arm, and on the combined brake and clutch controlling arm.

8, In a device of the class described, the combination of a support, a xed pulley vshaft secured in and extending from said support, a pair off clutch pulleys each loose on said shaft, an end-thrust bearing between the support and the adjacent driven pulley and an anti-friction bearing defining `the other' end of the other or driving pulley and a shifter pivotally mounted .on the support and-havlng van adjusting screw movable ax- 1ally ofl the shaft for engaging said antifriction bearing andAacting therethrough to move the driving pulley into clutching engagement wlth the driven pulley and for moving the driven pulley into bearingl engagement with the end thrust bearing.

9. In a device of the class described, the combination of a support, a hollow lypulley shaftmounted in s'aid support, means for demountably securing the shaft in place, a pair of clutch pulleys both loose on the shaft, a vroller bearing carried by. one of the pulleys, a shifter for engaging said rollei` bearlng and acting therethrough to effect a driving engagement between the pulleys -and said hollow shaft providing a conduit for conducting a lubricant to the roller bearing.

10. ,In a device of the class described the combination of a support, a hollow pulley shaft mounted in said support. means for demountably securing the shaftin place, a pair of clutch pulleysgboth loosev on the shaft, a roller bearing carried by one of the pulleys, a shifter for engaging sa-id roller` bearing and actipg therethrough to effect a driving engagement between the pulleys'and means for conducting a lubricant through the hollow shaft to said roller bearin v v 11. In a device of the class described, the

ceptacle mounted on one side of ythe 'support, a hollow shaft extending through the support with one end terminatingv in the receptacle and theA other end projecting from the opposite side of the bracket, a

lit

pair fol clutch pulleys carried by said. pro- )ecting' part of the shaftyaroller bearing carried by one of the pulleys' adapted to` be engaged by a shifter to move' the pulleys into a driving rela-tion and means for causing lubricant to travel from the reservoir throu h said shaft to the roller bearing.

12. n a device of the class described the combination of a support, a lubricant receptacle. mounted on one side of the support, a hollow shaft extending through the support with one end terminating in the receptacle and the other end projecting from the oppol site side of the bracket, a pair of clutch pulleys carried by said projecting ,part of of the pulleys adapted to be-engaged by a shifter to move the pulleys into a driving relation and a wick in said hollow shaft with one end in said receptacle and the other end adjacent the roller bearing.

13. ln a device of the class described, the combination with a support, of a plate vtoi-med of insulating material and means for demountably securing the same to said su port a circuit closer including a metallic re atively xed contact secured in said insulating plate, and a lever pivotally` mounted in the plate and constituting the movabe element of the circuit closer, a spring acting on the movable contact and tendlng normally to maintain the'contacts in closed 'position and socket terminals carried by the plate and connected electrically to the contactsvvhereby the removal of the plate will carry with it the circuit closera'nd its socket teinals.

1a.- lln a device of the class' described, the combination with a support, of a plate formed of insulating material and means for demountably securing the same to said support, a circuit closer including a metallic, elativel .ixed, contact secured in said insuatin the p ate and constituting the movable element of the circuit closer, a spring acting on the movable contact and tendlng normally to maintain the contacts in closed position, socket terminals carried by the plate andconnected electrically to the contacts and a plunger mounted movement and adapted to bear on the ylever to move'the, same into lcircuit breaking position against the tension of said spring.

15. ln a device of the class described, the combination with a support, of a plate formed of insulating material, means for demountably securing the same to said support, a circuit closer including a metallic, relatively fixed, contact secured in said insulating plate land a lever pivotally mounted in the plate and constituting the movable element of the circuitcloser, a spring acting on the movable contact and tending nor-lmally. to maintain the contacts in closed for sliding f maar.

position,a socket terminals carried by the Athe shaft; 'a roller bearing carried by one:

p ate, a lever pivotally mounted in plate and connected electrically to thevcontacts, a plunger mounted for sliding` movement and adapted to bear, on thelever to move the same into circuit breaking position against the tension of said spring, a Vmanually actuated lever adapted-normally tov bear,

on said plunger and to `act therethrough to move the circuit closer into open posltion,l

and a spring having a greater tension than the first named spring acting on the lever to move the same into operative position.

16. ln a device of the class described, the combination of a-bracket, aninsulating plate carried by said bracket and provided with a circuit closer including a relatively fixed element and a. lever constituting a relatively movable element, a cover coactlng with the plate to form a circuit closer containing casing, said cover provided with a plungerk guiding sleeve, a plunger slidably mounted 1n said sleeve with one end projecting` exteriorly' of the casing and the other end bearingon the lever and tending when moved by force external of the casing to move the lever into circuit opening position.

17. ln a device of the class described, the combination of a bracket, an insulating plate carried by said bracket and provided with a circuit closer including a relatively fixed element and a lever constitutin -a relatively movable element, a cover coactlng with `the plate to form a circuit closer containing casing, said cover provided with. a plunger iding sleeve, a lunger slidably mounted 1n said sleeve Wit one end projecting exteriorly of the casing and the other end bearing on the lever and tending when moved leverl into circuit spring position, and means for engaging the externally projecting portion of the plunger thereby to control the circuit closer. y i

18. In a device of the class described, the combination of a molded plate formed of insulating material and including a plurality of'inserts on one side thereof, said inserts including a fixed contact, a lever pivot and a pair of socket terminals, With one connected electrically to the fixed contact-and the other similarly connected to the lever lll@ pivot, all of said inserts being secured in position coeval With,y the formation of the plate.

`. `19. lln a device of the class described, the

including a xedcontact,a lever pivot and combination of a molded plate formed of insulating material and including a plurality of inserts on one side thereof, said inserts a pair of socket terminals, with' one connected electrically to the xed contact and the other similarly connected to the lever pivot, all ofsaid inserts being secured in position coeval with the formation of the lill@ plate, a lever pivotally connected to said and bolts passing leverpivot and constituting a movable contact-coacting with the fixed Contact to form a circuit closer.

20. In a device of the class described, the combination of aA molded plate. formed of insulating material and including a plurality of inserts on one side thereof, said inserts including a fixed contact, a lever pivot and a pair of socket terminals, with one connected electrically to the xed contact and the other similarly connected to the lever pivot, all ofsaid inserts being secured in position coeval with the .formation of the plate, a lever pivotally connected to said lever pivot and constituting a movable contact coacting with the fixed contact to form a circuit closer, and a spring disposed between one of the terminals and one arm of the lever. L 21. In a device of the class described, the combination of a molded plate having a fixed Contact and two inserted socket vterminals formed coeval therewith, a lever pivoted to the plate and coacting with the fixed contact to form a circuit closer, and a spring between one of the terminals and the lever to maintain the. same in bearing engagement with the fixed contact.

22. In a device of the class described, the combination of a molded plate having a fixed contact and two inserted socket terminals formed coeval therewith, a lever pivoted to the plate and coactingwith the fixed contact to form a circuit closer, and a spring between one of the terminals and the levery to maintain the same in bearing engagement with the fixed contact, said \p'late formed with apertures passing f therethrough and adapted to receive fastening means for mounting the plate in position.

23. In a device of the class described, the combination with a support of a molded plate having a fixed contact and 'two inserted socket terminals formed coeval therewith, a lever pivoted tothe plate and coacting with the fixed contact to form a circuit closer, a spring between one of the terminals and the lever to maintain the samed inl bearing lengagement with the fixed contact. through the plate and supp'ort'for securing the plate in place.

24. In a device of the class described, the i lcombination of a molded plate of insulating material, a-plurality of inserts in one face thereof, two of said inserts vconstituting socket terminals, and another. of said inserts constituting a fixed terminal of a circuit cleser, a lever constituting the movable element of the circuit closer mounted onjsaid face, a plurality of inserts on the opposite face of the plate constituting electric conductors and through bolts coacting. therewith to electrically connect one of the terminals with the fixed Contact, and the other terminal with the lever.

25. In a device of the class @scribed thev combination of a molded plate of insulating materials, a plurality of inserts in one face thereof, two of said inserts constituting socket terminals, land another of said inserts constituting a fixed terminal of a c'ircuit closer, a leverconstituting the movable element of the circuit' closer mounted on said face a plurality of inserts on the opposite face of the plate constituting electric conductors, through bolts coacting therewith to electrically connect one of the terminals with the fixed contact, and the other terminal with the lever, said lever and one of the terminals provided with aligned spring guiding studs and a spring encircling said studs and bearing on the lever to move the same into bearing engagement with the fixed contact.

226. In a device'of the class described, the l combination of a molded plate of insulating material, a plurality of inserts in one face thereof, two of said inserts constituting socket terminals, and another of said inserts constituting alixed terminal of a circuit closer, a lever constituting themovable element of the circuit closer mounted on said face, a plurality of inserts on the opposite face of the Vplate constituting electric conductors, through bolts coacting therewith to electrically connect one of the terminals with the fixed contact, and the other terminal with the. lever, an electric socket adapted to be fitted to said terminals and a cover for uthe moldedvplate yprovided wlith an aperture for guiding the socket into p ace.

27. In a device of the class described, the

combination of a pulley shaft, adapted to 28. In a device of the class described," thecombination of a pulley shaft adapted to receive pulleys of different radii,A apulley 'mounted on 'said shaft..a manually actuated `control member pivotally mounted for rocking movement about a fixed axis, va brake carried by the member andadapted to engage the'periphery of the pulley. to brake `the `same as said member. is actuated, said brake having two operable faces and being.

reversible to cause either. face to engage with the pulley.-

29. In a device of the class described, the vcombination of a pulley shaft adapted to receive pulleys of different radii, a pulley 'mounted on said shaft, a manually actuated control member pivotally mounted for rocking movement about a fixed axis, a brake carried by the member and adapted to engage the periphery of the pulley to brake the same as said member is actuated, said brake havingtwo operable faces and being reversible to cause either face to engage with the pulley, and means for adjusting either face relative, to the pulley to be braked.

30. lln a device of the class described, the combination With a pulley clutch, a pivotally mounted and manuallyjactuated member having a( lever arm Afor engaging the clutch to move the same axially into operative position and having another lever arm constituting a brake support, and a brake pivotally mounted on said brake support. for engaging the periphery of'one Vof the pulleys forming the clutch and a set screw for adjusting the brake relative to the supportand thus i'lative to the' pulley engaged by the brake.

31. ln a device ofthe class described, the combination with a pulley clutch, a pivotally mounted and manually actuated ,member having a lever arm for engaging the clutch to move the same axially into operative position and having another lever arm constituting a brake support, a brake pivotally mounted on said brake support for engaging the periphery of one of the pulleys forming i* the clutch, a set screw for adjusting the brake relative to the support and thus relative to the pulley engaged by the brake and a spring acting on the manually actuated member for moving the brake into engagement Withfthe pulley.

32. lln a device of the class described, the combination of a pulley, a' manually actuated control member mounted for rocking movement about an vaxis offset from the pulley/a brake member having a plurality of operative work faces for engaging the periphery of the pulley and means for mount` ing the brake member on the control member and'in offset relation toits axis to set any desired Work face-of the brake in position toengage the pulley when the control member is rocked.

33. In a device of the class described, the combination with a shaft adapted to receive pulleys Volf' did'erent diameters, a pulley mounted on said shaft, a/(mntrol member mounted for rocking movement about an axis at right angles to said shaft, a brake supporting shaft carried by the member parallel to its axis, a brake member having oppositely disposed Work faces adapted to be mounted on said brake supporting'shaft to bring either Work face into opposition to the pulley.

34. In a device of the class described, the combination with a shaft adapted to receive pulleys of different diameters, a pulley Maaate bring either Work face linto opposition to the pulley and adjusting means-for varying Athe engagement of either Work :face With the pulley.

35. -lln a device of the class described, the combination of a member mounted for rotary movement, a manually actuated con trol member mounted for rocking movement, a llT-shaped brake member with opposite ends of the head thereof constituting Work forces each adapted to engage the rotary member to brake the same and means for mounting the stem of the brake member on the control member.

36. lln a device of the class described,V the combination of a member mounted lfor rotary movement, a manually actuated 'control member mounted for rocking movement, a lV-shaped brake member` with opposite ends of the head thereof constituting Work forces each adaptedv to engageV the rotary member to brake the same, means for pivotally mounting the stem of the brake member on the control member and a set screw for adjusting the brake member relative to the control member.

37. lin a device of theclass described, the combination with a member to be braked, of a` control member mounted for rocking movement about an 'axis and having a pivoting stud paralleling said axis, a 'IT-shaped brake member with opposite ends of the head thereof each constituting a braking surface for engaging the member to be braked, the stem of said T shaped member being ollset fromV a line perpendicular to the center Aof the head and said o'set portion provided With a hub for engagingthe stud.-

38. ln a device of the class described., the combination with a member to be braked, of a control member mounted for rocking movement about an axis and havin a pivoting stud paralleling said axis, a T-s aped b-rake member with opposite` ends of thev head thereof each constituting a braking surface for engaging the member to be braked, the v stem of said T-shaped member being olset from a line perpendicular to the center of the head and said offset portion provided with a hub for engaging the stud and means for setting the ll'shaped`member in adjusted rotary position about said stud.

39. In a device of lthe class described, the combination of'a pulley clutch, a single manually actuated control member mounted for rocking movement and including a lever arm for controlling the clutch and a periphery engaging brake member for braking one of the pulleys of the clutch when the clutch is in non-clutching position, said brake member provided with a, plurality of brake surfaces and means for mounting the brake member on the control'member to bring any one of said surfaces at will into operative relation to the pulley7 to be braked.

40. ln a device of the class described, the

vcombination with a member to be braked, 10 a control member and a brake member llavdey of June, A. D. '192i'.

ing oppositely disposed brake surfaces and means for mounting the brake member on the control member in reversible position to bring either surface into engaegment with the member to be braked.,

'Signed at New York cit in the county of New York and State of' ew York this 2nd MAX TAIGMAN. 

